Carbon-scraper.



F. W. BAXTER.

CARBON SCRYAPER. APPLICATION FILED MAR. 4, 1915.

1 ,22 9,35%.. Patented Oct. 24, 1916.

I 7 I I rNr mmms PETERS co. PHOYD-LITHO WASNINCYDN. n c.

FREDERICK W. BAX'IER, OF CORNING, NEW] YORK.

CARBON-SCRAIPER.

Application filed March 4, 1915.

To all whom it may concern Be it known that I, FREDERICK l V. BAX- rnn, a citizen of the United States, residing at Corning, in the county of Steuben and State of New York, have invented a new and useful Carbon-Scraper; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to an improved carbon scraper for scraping or removing the carbon from the top of pistons, the heads of cylinders, and also from the interior circumference of he walls of combustion chambers of internal combustion engines.

One of the features of the invention is the provision of a suitable rod, which may be bent into different shapes, in order to reach all parts of the interior of a combustion chamber.

Another feature of the invention is the provision of a scraper blade formed integrally with the end of the rod and gradually merging into the same. Another feature of the invention is to construct the scraper blade concaved as shown, so as to more elliciently remove the carbon from the interior surface of the chamber, especially in view of the fact that the end portion of the rod that carries the blade is curved, as shown. so that the scraper blade will contact with the interior surface of the chamber as illustrated.

The forming of the scraper blade as merging gradually integrally into the end of the curved portion of the rod is accomplished by beating the blade from the end of the rod, and into the proper shape. Another method is to weld the blade to the end of the curved part of the rod.

In practical fields the details of construction may necessitate alterations, falling within the scope of what is claimed.

The invention comprises further features and combination of parts, as hereinafter set forth, shown in the drawings and claimed.

In the drawings :-Figure 1 is a plan view of the improved carbon scraper constructed in accordance with the invention, and showing the application or the use of the same. Fig. 2 is a sectional view on line 2-2 of Fig. 1, showing the scraper removing the carbon from the inner circumferential surface of the cylinder. Fig. 3 is a sectional view im lar t Fin shavi g the wer Specification of Letters Patent.

Patented Get. 24;, 191%.

Serial No. 12,185.

removing the carbon from the piston end. Fig. 4 is an enlarged perspective view of the scraper. Fig. 5 is a sectional view on line 55 of Fig. at. Fig. 6 is a view on line el-l of Fig. l.

Referring more especially to the draw ings, l desi nates a metallic rod, which may be bent into different shapes, but which after bent has considerable rigidity. This rod may be bent in one shape, in which case .1 greater portion 2 is substantially straight,

while the smaller portion of the rod is.

curved as shown at 3. The rod may be bent in other shapes than those shown, as is apparent. One end of the rod, for instance, the end of the straight portion is provided with suitable handle i. The end of the curved part 3 of the rod terminates in an elongated scraper blade 5, which is concaved longitudinally and transversely as shown at 6. The rod at the scraping blade merges into said blade integrally, owing to the rods at this point gradually increasing in diameter, until it merges into an elongated scraper blade substantially of oblong contour, the cutting edges of which are hereinafter set forth. The rear face of the blade gradually tapers and merges integrally into the end of the curved part of the rod, and is constructed in this manner, either by beating the blade from the end of the rod, which is a preferable method, or by welding the blade to the rod. This concave blade is provided with cutting edges 7 and 8, which is slightly curved, and through the medium of the rounded corners (which are also capable of cutting the carbon), merge into the end cutting edges, thereby facilitating the removal of the carbon from the wall of the combustion chamber. In other words, the cutting edges will cut the carbon from the inner face of wall of the chamber, by imparting an up and down and lateral movement to the blade, that is, when scraping the cylindrical wall. By forming the blade concaved in this manner, it enables the blade to more efficiently scrape the carbon from the interior of a chamber, for the opposite edges, sav for instance the edge portions 7 and 8 will scrape the carbon upon upward and downward strokes of t e rod. That is, in forcing the rod downwardly, the edge 8 will tend to scrape the carbon. and upon its upward stroke, the same edge 8 will remove the carbon. provided, however, the edge 8 maintained substantial y n contact withthe inner circumference of the chamber. I

The invention having beenset forth, what is claimed as new and useful is:

1. A carbon scraper constructed from singlepiece of rod material constituting a scraper shank; being: flexible and adapted to be bent in different rigid shapes, said rod having a handle at one end, the other end portion ofthe rod gradually diverging outwardly which, in cross section, being of gradual increasing diameters, and merging integrally into an elongated scraper blade substantially of oblong contour and having longitudinal and endcutting edges slightly curved and m'ergir-ig into roandedeopners anddes'igned to conform to the cylindrical contenr of a chamber, the outer face of the blade being dished or concaved transversely and longitudinally so as to insure said cutting edges to firmly'en'gage the cylindrical surfa'ce of the chamber.

2. A carbon scraper, coin-prising a scraper shank consisting of a single length of flex- FREDERICK V. BAXTER.

Witnesses C'. E. PIER, WV. B. HUNT.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D; O. 

